
html {
    width: 100%;
    height: 100%;
}
body {
    width: 100%;
    height: 100%;
    background-image: url("海.jpg");
    background-position: center center;
    background-repeat: no-repeat;
    background-size: cover;
}
#option {
    width: 100%;
    height: 30px;
    display: flex;
    justify-content: space-around;
}
#option input {
    display: block;
    font-weight: 900;
    font-size: 15px;
    color: rgba(255, 255, 255, 0.618);
    border-radius: 9px;
    background-color: rgba(251,114,153, 0.7);
}
.ifm {
    height: calc(100% - 30px);
    display: flex;
    justify-content: center;
    align-items: center;
}
iframe {
    width: 1200px;
    height: 600px;
}
